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Home >> Lexus >> 2024 >> RC 350 Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 63 (Automatic Transmission System (2GR-FSE,A760H) - Diagnostic Codes (2 Of 2) & Circuit Tests) >> AUTOMATIC TRANSMISSION SYSTEM (for 2GR-FSE) >> Shift Paddle Switch Circuit [09/2014 - 11/2017] >> Procedure

Shift Paddle Switch Circuit [09/2014 - 11/2017]: Procedure

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (SHIFT PADDLE SWITCH - ECM) 
    1. Disconnect the A71 ECM connector.
      GTY516097Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Rear view of wire harness connector
      (to ECM)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A71-8 (SFTU) - Body ground "+" (up-shift) shift paddle operated and held Below 2.5 Ω
      "+" (up-shift) shift paddle not operated 1 MΩ or higher
      A71-7 (SFTD) - Body ground "-" (down-shift) shift paddle operated and held Below 2.5 Ω
      "-" (down-shift) shift paddle not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result: 

    NG 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND) 
    1. Disconnect the O25 spiral cable sub-assembly connector.
      GTY504549Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Spiral Cable Sub-assembly)
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      O25-2 (ECC) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    1. Inspect the spiral cable sub-assembly.

      Refer to INSPECTION [09/2014 - 11/2017]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  COMPONENTS [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  4

  4. INSPECT SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the transmission shift switch assembly.

      Refer to REMOVAL [09/2014 - 11/2017]

      GTY512901Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch LH (Transmission Shift Switch Assembly))
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      B-1 (SDN) - B-2 (ECC) "-" (down-shift) shift paddle operated and held Below 2.5 Ω
      "-" (down-shift) shift paddle not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH LH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  5

  5. INSPECT SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY) 
    1. Remove the transmission shift switch assembly.
      GTY497450Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Shift Paddle Switch RH (Transmission Shift Switch Assembly))

      Refer to REMOVAL [09/2014 - 11/2017]

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-3 (SUP) - A-2 (ECC) "+" (up-shift) shift paddle operated and held Below 2.5 Ω
      "+" (up-shift) shift paddle not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE SHIFT PADDLE SWITCH RH (TRANSMISSION SHIFT SWITCH ASSEMBLY). Refer to  COMPONENTS [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  6

  6. INSPECT NO. 1 SWITCH WIRE 
    1. Install the transmission shift switch assembly.
      GTY497066Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (No. 1 Switch Wire)
    2. Disconnect the z6 No. 1 switch wire connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z6-1 (SUP) - z6-3 (ECC) "+" (up-shift) shift paddle operated and held Below 2.5 Ω
      "+" (up-shift) shift paddle not operated 1 MΩ or higher
      z6-2 (SDN) - z6-3 (ECC) "-" (down-shift) shift paddle operated and held Below 2.5 Ω
      "-" (down-shift) shift paddle not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE NO. 1 SWITCH WIRE. Refer to  COMPONENTS [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  7

  7. CHECK STEERING PAD SWITCH ASSEMBLY 
    1. Connect the z6 No. 1 switch wire connector to the steering pad switch assembly.
      GTY463175Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (Steering Pad Switch Assembly)
    2. Disconnect the z4 steering pad switch assembly connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      z4-6 (SUP) - z4-7 (ECC) "+" (up-shift) shift paddle operated and held Below 2.5 Ω
      "+" (up-shift) shift paddle not operated 1 MΩ or higher
      z4-12 (SDN) - z4-7 (ECC) "-" (down-shift) shift paddle operated and held Below 2.5 Ω
      "-" (down-shift) shift paddle not operated 1 MΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to  COMPONENTS [09/2014 - 11/2017] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM) 
    1. Disconnect the O25 spiral cable sub-assembly connector.
    2. Disconnect the A71 ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A71-8 (SFTU) - O25-14 (SUP) Always Below 1 Ω
      A71-7 (SFTD) - O25-7 (SDN) Always Below 1 Ω
      A71-8 (SFTU) or O25-14 (SUP) - Body ground Always 10 kΩ or higher
      A71-7 (SFTD) or O25-7 (SDN) - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [09/2014 - 11/2017] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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